Cisco Cisco TelePresence Video Communication Server Expressway
Example Network Deployment
Figure 1 Example Network for the Deployment Described in this Document
Network Elements
Internal Network Elements
The internal network elements are devices which are hosted on your local area network. Elements on the internal
network have an internal network domain name. This name is not resolvable by a public DNS. For example, the VCS
Control is configured with an internally resolvable name of vcsc.internal-domain.net (which resolves to an IP address
of 10.0.0.2 by the internal DNS servers).
network have an internal network domain name. This name is not resolvable by a public DNS. For example, the VCS
Control is configured with an internally resolvable name of vcsc.internal-domain.net (which resolves to an IP address
of 10.0.0.2 by the internal DNS servers).
Element
Role
VCS Control
SIP Registrar & Proxy and H.323 Gatekeeper for devices which are located on the internal
network.
network.
EX90 and EX60
Example endpoints hosted on the internal network which register to the VCS Control.
DNS (local 1 &
local 2)
local 2)
DNS servers used by the VCS Control to perform DNS lookups (resolve network names on the
internal network).
internal network).
DHCP Server
Provides host, IP gateway, DNS server, and NTP server addresses to endpoints located on the
internal network.
internal network.
Cisco TMS Server
Syslog Server
.
NTP Server
Provides the clock source used to synchronize devices.
SIP and H.323 Domain
The example deployment is configured to route SIP (and H.323) signaling messages for calls made to URIs which use
the domain example.com. The DNS SRV configurations are described in
the domain example.com. The DNS SRV configurations are described in
8
Cisco Single VCS Control - Basic Configuration Deployment Guide
Introduction